<template>
  <PageSkeleton v-if="isLoading" />
  <view class="viewport" v-else>
    <!-- 推荐封面图 -->
    <view class="cover">
      <image class="image" mode="widthFix" :src="bannerPicture"></image>
    </view>
    <view class="tabs">
      <text
        v-for="(item, index) in subTypes"
        :key="item.id"
        class="text"
        :class="{ active: index === activeIndex }"
        @tap="activeIndex = index"
        >{{ item.title }}</text
      >
    </view>
    <!-- 推荐列表 -->
    <scroll-view
      enable-back-to-top
      v-for="(item, index) in subTypes"
      :key="item.id"
      v-show="activeIndex === index"
      scroll-y
      class="scroll-view"
      @scrolltolower="onScrolltolower"
    >
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in item.goodsItems.items"
          :key="goods.id"
          :url="`/pages/goods/goods?id=${goods.id}`"
        >
          <image class="thumb" mode="widthFix" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading-text"> {{ item.finish ? '没有更多数据了~' : '正在加载...' }}</view>
    </scroll-view>
  </view>
</template>

<script lang="ts" setup>
import { getHotRecommendAPI } from '@/api/modules/hot'
import type { SubTypeItem } from '@/types/hot'
import { onLoad } from '@dcloudio/uni-app'
import { ref } from 'vue'
import PageSkeleton from './components/PageSkeleton.vue'

// 热门推荐页 标题和url
const hotMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '新鲜好物', url: '/hot/new' },
]
//接收参数
const query = defineProps<{
  type: string
}>()
//获取当前推荐项
const currentMap = hotMap.find((v) => v.type === query.type)
//设置动态标题
uni.setNavigationBarTitle({ title: currentMap!.title })

// 是否加载中标记
const isLoading = ref(false)
// 推荐封面图
const bannerPicture = ref('')
// 推荐选项
const subTypes = ref<(SubTypeItem & { finish?: boolean })[]>([])
// 高亮的下标
const activeIndex = ref(0)
// 获取热门推荐数据
const getHotRecommendData = async () => {
  isLoading.value = true
  const res = await getHotRecommendAPI(currentMap!.url, {
    // 技巧：环境变量，开发环境，修改初始页面方便测试分页结束
    page: 1,
    pageSize: 10,
  })
  bannerPicture.value = res.result.bannerPicture
  subTypes.value = res.result.subTypes
  isLoading.value = false
}

// 页面加载
onLoad(() => {
  getHotRecommendData()
})

// 滚动触底
const onScrolltolower = async () => {
  // 获取当前选项
  const currsubTypes = subTypes.value[activeIndex.value]
  // 分页条件
  if (currsubTypes.goodsItems.page < currsubTypes.goodsItems.pages) {
    // 当前页码累加
    currsubTypes.goodsItems.page++
  } else {
    // 标记已结束
    currsubTypes.finish = true
    // 退出并轻提示
    return uni.showToast({ icon: 'none', title: '没有更多数据了~' })
  }

  // 调用API传参
  const res = await getHotRecommendAPI(currentMap!.url, {
    subType: currsubTypes.id,
    page: currsubTypes.goodsItems.page,
    pageSize: currsubTypes.goodsItems.pageSize,
  })
  // 新的列表选项
  const newsubTypes = res.result.subTypes[activeIndex.value]
  // 数组追加
  currsubTypes.goodsItems.items.push(...newsubTypes.goodsItems.items)
}
</script>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}

.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}

.cover {
  width: 100%;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  z-index: 1;
  position: absolute;
  left: 0;
  top: 0;

  .image {
    width: 100%;
  }
}

.tabs {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
  height: 100rpx;
  z-index: 9;
  background-color: #fff;
  position: relative;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  line-height: 90rpx;
  margin: 180rpx 20rpx 0;
  font-size: 28rpx;

  .text {
    position: relative;
    margin: 0 20rpx;
  }

  .active {
    &::after {
      content: '';
      width: 40rpx;
      height: 4rpx;
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 20rpx;
      transform: translate(-50%);
    }
  }
}

.goods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-row-gap: 20rpx;
  grid-column-gap: 20rpx;
  padding: 0 20rpx;
  margin-top: 20rpx;

  .navigator {
    width: 100%;
    padding: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }

  .thumb {
    width: 100%;
    aspect-ratio: 1;
  }

  .name {
    height: 88rpx;
    font-size: 26rpx;
  }

  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }

  .symbol {
    font-size: 70%;
  }

  .decimal {
    font-size: 70%;
  }
}

.loading-text {
  text-align: center;
  font-size: 28rpx;
  color: #666;
  padding: 20rpx 0 50rpx;
}
</style>
